<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
    <style>
        .active{
            color: aqua;
        } 
    </style>
</head>
<body>
    <div id="app">
        <h2 class="active">{{message}}</h2>
        <h2 :class="active">{{message}}</h2>
        <!-- <h2 v-bind:class="{类名1:boolean,类名2:boolean}"></h2> 通过boolean确定类-->
        <h2 v-bind:class="{active:isactive,line:isline}">{{message}}</h2>
        <!-- 对象语法 -->
        <button v-on:click="btnClick">按钮</button>
    </div>
    <script>
        const app=new Vue({
            el:'#app',
            data:{
                message: '你好啊',
                isactive:true,
                isline:true,
            },
            methods:{
                btnClick:function(){
                    this.isactive=!this.isactive
                }
            }
        });
    </script>
</body>
</html>